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plugins.cpp
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plugins.cpp
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/**
* @file plugins.cpp
* @brief Brief description of file.
*
*/
#include <dlfcn.h>
#include <strings.h>
#include <string.h>
#include <dirent.h>
#include <math.h>
#include <stdint.h>
#include <string>
#include <sstream>
#include <unordered_map>
#include <vector>
#include <iostream>
#include "channel.h"
#include "exception.h"
#include "bounds.h"
#include "process.h"
#include "ctrl.h"
#include "plugins.h"
const LADSPA_Descriptor *getLocal(unsigned long i,unsigned long j);
using namespace std;
PluginData::PluginData(string l,const LADSPA_Descriptor *d){
label=l;
desc=d;
// get the default port values
for(unsigned int i=0;i<desc->PortCount;i++){
const LADSPA_PortRangeHint *h = desc->PortRangeHints+i;
int hd = h->HintDescriptor;
float lower = -200;
float upper = 200;
if(h->HintDescriptor & LADSPA_HINT_BOUNDED_ABOVE)
upper = h->UpperBound;
if(h->HintDescriptor & LADSPA_HINT_BOUNDED_BELOW)
lower = h->LowerBound;
if(h->HintDescriptor & LADSPA_HINT_SAMPLE_RATE){
if(h->HintDescriptor & LADSPA_HINT_BOUNDED_BELOW)
lower *= Process::samprate;
if(h->HintDescriptor & LADSPA_HINT_BOUNDED_ABOVE)
upper *= Process::samprate;
}
if(hd & LADSPA_HINT_DEFAULT_MINIMUM)
defaultPortValues[i]=lower;
else if(hd & LADSPA_HINT_DEFAULT_LOW){
if(hd & LADSPA_HINT_LOGARITHMIC)
defaultPortValues[i]=exp(log(lower)*0.75f+log(upper)*0.25f);
else
defaultPortValues[i]=lower*0.75f+upper*0.25f;
} else if(hd & LADSPA_HINT_DEFAULT_MIDDLE){
if(hd & LADSPA_HINT_LOGARITHMIC)
defaultPortValues[i]=exp(log(lower)*0.5f+log(upper)*0.5f);
else
defaultPortValues[i]=lower*0.5f+upper*0.5f;
} else if(hd & LADSPA_HINT_DEFAULT_HIGH){
if(hd & LADSPA_HINT_LOGARITHMIC)
defaultPortValues[i]=exp(log(lower)*0.25f+log(upper)*0.75f);
else
defaultPortValues[i]=lower*0.25f+upper*0.75f;
} else if(hd & LADSPA_HINT_DEFAULT_MAXIMUM)
defaultPortValues[i]=lower;
else if(hd & LADSPA_HINT_DEFAULT_0)
defaultPortValues[i]=0;
else if(hd & LADSPA_HINT_DEFAULT_1)
defaultPortValues[i]=0;
else if(hd & LADSPA_HINT_DEFAULT_100)
defaultPortValues[i]=100;
else if(hd & LADSPA_HINT_DEFAULT_440)
defaultPortValues[i]=440;
// else there's no default and we write nothing. The
// user must provide!
if(defaultPortValues.find(i)!=defaultPortValues.end()){
// cout << "default for " << i <<
// " (" << desc->PortNames[i] << ")" <<
// " set to " << defaultPortValues[i] << endl;
} else {
// cout << "Port " << i <<
// " (" << desc->PortNames[i] << ")" <<
// "has no default" << endl;
defaultPortValues[i]=0; // it's as good as anything else
}
}
}
int PluginData::getPortIdx(string name){
if(shortPortNames.find(name)!=shortPortNames.end()){
return shortPortNames[name];
} else {
for(unsigned int i=0;i<desc->PortCount;i++){
if(!strcmp(desc->PortNames[i],name.c_str())){
return i;
}
}
}
throw _("cannot find port '%s' in plugin '%s'",
name.c_str(),label.c_str());
}
bool PluginData::getDefault(string pname,float *f){
int idx = getPortIdx(pname);
if(defaultPortValues.find(idx)==defaultPortValues.end())
return false;
else
*f = defaultPortValues[idx];
return true;
}
void PluginInstance::dump(){
for(unsigned int i=0;i<p->desc->PortCount;i++){
float *paddr = connections[i];
printf("%d %p\n",i,paddr);
}
}
Bounds PluginData::getBounds(string pname) {
Bounds b;
b.flags = 0;
int idx = getPortIdx(pname);
const LADSPA_PortRangeHint *h = desc->PortRangeHints+idx;
if(h->HintDescriptor & LADSPA_HINT_BOUNDED_BELOW){
b.lower = h->LowerBound;
if(h->HintDescriptor & LADSPA_HINT_SAMPLE_RATE)
b.lower *= Process::samprate;
b.flags |= Bounds::Lower;
}
if(h->HintDescriptor & LADSPA_HINT_BOUNDED_ABOVE){
b.upper = h->UpperBound;
if(h->HintDescriptor & LADSPA_HINT_SAMPLE_RATE)
b.upper *= Process::samprate;
b.flags |= Bounds::Upper;
}
if(getDefault(pname,&b.deflt))
b.flags |= Bounds::Default;
if(h->HintDescriptor & LADSPA_HINT_LOGARITHMIC)
b.flags |= Bounds::Log;
return b;
}
void PluginData::addShortPortName(string shortname,string longname){
for(unsigned int i=0;i<desc->PortCount;i++){
if(!strcmp(desc->PortNames[i],longname.c_str())){
shortPortNames[shortname]=i;
return;
}
}
throw _("cannot find port '%s' in plugin '%s'",
longname.c_str(),label.c_str());
}
static std::vector<PluginInstance *> instances;
// instantiate this plugin and connect all control ports
// to default values - this may be overwritten by actual
// Values.
PluginInstance::PluginInstance(PluginData *plugin,string n,string chainname) : portsConnected(128){
p=plugin;
name = n;
h=(*p->desc->instantiate)(p->desc,Process::samprate);
// connect up the ports, creating new values for each control
// and create output buffers
for(unsigned int i=0;i<p->desc->PortCount;i++){
portsConnected[i]=false;
if(LADSPA_IS_PORT_CONTROL(p->desc->PortDescriptors[i])){
float initval;
if(p->defaultPortValues.find(i)!=p->defaultPortValues.end())
initval = p->defaultPortValues[i];
else
initval = 0; // really, there should be a default.
Bounds b = plugin->getBounds(p->desc->PortNames[i]);
Value *v = new Value(chainname+"/"+n+"/"+std::string(p->desc->PortNames[i]));
// if no upper or lower bound set, what to do???
// Just set to the default val for now.
v->mx = (b.flags & Bounds::Upper)?b.upper:initval+1000;
v->mn = (b.flags & Bounds::Lower)?b.lower:initval-1000;
v->setdef(initval);
v->reset();
paramsMap[p->desc->PortNames[i]]=v;
paramsList.push_back(p->desc->PortNames[i]);
// we don't set DB here - it would confuse plugins
// expecting a DB value if we've converted it already
float *addr = v->getptr();
// cout << "Connecting port " << p->desc->PortNames[i]
// << "(" << i << ") with " << addr <<endl;
(*p->desc->connect_port)(h,i,addr);
connections[i]=addr;
portsConnected[i]=true;
}
else if(LADSPA_IS_PORT_OUTPUT(p->desc->PortDescriptors[i])){
opbufs[i] = new float[BUFSIZE];
// cout << "Connecting OUTPUT port " << p->desc->PortNames[i]
// << "(" << i << ") with " << opbufs[i] <<endl;
(*p->desc->connect_port)(h,i,opbufs[i]);
connections[i]=opbufs[i];
}
}
isActive=false;
instances.push_back(this);
}
PluginInstance::~PluginInstance(){
// deactivate and clean up the effect
if(isActive && p->desc->deactivate)
(*p->desc->deactivate)(h);
if(p->desc->cleanup)
(*p->desc->cleanup)(h);
// delete output buffers
for(unsigned int i=0;i<p->desc->PortCount;i++){
if(LADSPA_IS_PORT_OUTPUT(p->desc->PortDescriptors[i])){
delete opbufs[i];
}
}
// delete values (should also delete control associations)
for(unsigned int i=0;i<paramsList.size();i++){
Value *v = paramsMap[paramsList[i]];
Ctrl::removeAllAssociations(v);
delete v;
}
}
void PluginInstance::activate(){
checkPortsConnected();
if(p->desc->activate)
(*p->desc->activate)(h);
isActive=true;
}
void PluginInstance::connect(string name,float *v){
int idx = p->getPortIdx(name);
cout << "Connecting port " << name << " with address " << v << endl;
(*p->desc->connect_port)(h,idx,v);
connections[idx]=v;
portsConnected[idx]=true;
}
void PluginInstance::checkPortsConnected(){
for(unsigned int i=0;i<p->desc->PortCount;i++){
if(!portsConnected[i] && LADSPA_IS_PORT_CONTROL(p->desc->PortDescriptors[i]))
throw _("port %d (%s) in plugin %s is not connected",
i,p->desc->PortNames[i],p->label.c_str());
}
}
void PluginMgr::deleteInstances(){
std::vector<PluginInstance *>::iterator it;
for(it=instances.begin();it!=instances.end();it++){
delete *it;
}
}
PluginInstance *PluginData::instantiate(string name,string chainname){
return new PluginInstance(this,name,chainname);
}
// data about the plugin in a file.
struct PluginFileData{
PluginFileData(){}
PluginFileData(string fn,int i){
filename=fn;
index=i;
}
string filename;
int index;
};
/// these are the ladspa plugins which are available - if NULL is
/// stored, the plugin has not been loaded.
static unordered_map<string,PluginFileData> pluginFileData;
/// these are the loaded plugins
static unordered_map<string,PluginData *> plugins;
/// and whether we have that unique ID already.
static unordered_map<unsigned long,int> uniqueIDs;
void PluginMgr::loadFilesIn(const char *dir,bool permitNoDir){
DIR *d = opendir(dir);
if(!d){
if(permitNoDir)return;
else
throw _("unable to open LADSPA directory %s",dir);
}
while(dirent *e = readdir(d)){
const char *s = rindex(e->d_name,'.');
if(s){
if(!strcmp(s+1,"so")){
stringstream ss;
ss << dir << "/" << e->d_name;
string fname = ss.str();
void *h = dlopen(fname.c_str(),RTLD_NOW|RTLD_GLOBAL);
if(h){
dlerror(); // clear error
LADSPA_Descriptor_Function getdesc =
(LADSPA_Descriptor_Function)dlsym(h,"ladspa_descriptor");
if(!dlerror()){
// we just go through all the indices until
// we fail to get a plugin.
for(int i=0;;i++){
const LADSPA_Descriptor *desc = getdesc(i);
if(!desc)break;
string name = desc->Label;
cout << "Found plugin: " << name << " in " << fname <<endl;
if(uniqueIDs.find(desc->UniqueID)==uniqueIDs.end()){
uniqueIDs.emplace(desc->UniqueID,1);
pluginFileData.emplace(name,PluginFileData(fname.c_str(),i));
plugins[name]=(PluginData *)NULL;
pluginNames.push_back(name);
} else
cout << "ID CLASH" << endl;
}
}
dlclose(h);
}
}
}
}
for(unsigned long i=0;;i++){
for(unsigned long j=0;;j++){
const LADSPA_Descriptor *desc = getLocal(i,j);
if(!desc && !j)goto done; // exit if first one empty
if(!desc)break; // exit processing this "file"
// register
cout << "Found local plugin: " << desc->Label << endl;
plugins[desc->Label] = new PluginData(desc->Label,desc);
}
}
done:
;
}
vector<string> PluginMgr::pluginNames;
void PluginMgr::close(){
}
PluginData *PluginMgr::getPlugin(std::string label){
if(plugins.find(label)==plugins.end())
throw _("cannot find plugin '%s'",label.c_str());
if(plugins[label]==NULL){
// it's not loaded; do that.
PluginFileData& f = pluginFileData[label];
void *h = dlopen(f.filename.c_str(),RTLD_NOW|RTLD_GLOBAL);
if(h){
dlerror(); // clear error
LADSPA_Descriptor_Function getdesc =
(LADSPA_Descriptor_Function)dlsym(h,"ladspa_descriptor");
if(!dlerror()){
const LADSPA_Descriptor *desc = getdesc(f.index);
if(!desc)
throw _("cannot find descriptor %d in file %s",f.index,f.filename.c_str());
plugins[label]=new PluginData(label,desc);
// cout << "Loaded plugin " << label << endl;
} else
throw _("cannot find getdesc in file %s",f.filename.c_str());
} else
throw _("cannot open file %s",f.filename.c_str());
}
return plugins[label];
}